Toilet seat sterilizer



Sept. 13, 1932. R. E. PETERSON l TOILET' s'EATL STEEILIZER Filed June 1s, 195,1 s sheets-sheet' y1j INVENTOR v T E. PETERSON ROB WITNESSES ATTORNEYS www Sept. 13, 193,2. R. E. PETERSON TOIIJET SEAT STERILIZER Filed June 15, 1931 8 Sheets-Sheet 2 INVENTOR ROBERT E. PETERSON BY ATroRNEYs wlTNEsSE R. E. PETERSON TOILET SEAT STERILIZER sept. 13,1932.

Filed June 15. 1931 8 Sheets-Sheet 5 IIlll lll IIIIIHHUIL INVENTOR ROBERT` E. PETERSON mm1/p WlTNESSES ATTORNEYS Sept. 13, 1932. R, E; PETERSON 1,877,689

TOILET SEAT STERILIZER Filed June 13, 1931 8 Sheets-Sheet 4 lNvENToR R BERT E. PETER ATTORNEYS Sept. 13, 1932. & R. E. PETERSON 1,877,689

TOILET SEAT STERILIZER Filed June 13, 1951 8 sheets-sheet 5 Tia- @L 1L n w|TNE5sEs lNvENToR Wal/.4% ATTORNEYS @BERT E. PETERSON BYM/W 8 Sheets-Sheet 6 INVENTOR ROBERT E. PETERSO BYM ATTORNEYS R. E. PETERSON TOILET SEAT STERILI ZER Filed June 13, 1951 Sept. 13, 1932.

Sepi- 13, 3932 'y l R. EPETERSON TOILET SEAT STERILIZER.

Filed June 13, 1931 8 Sheets-Sheet 7 WHW-15555 l INVENTOR 42 v ROBERT E. PETERSON 4f ATTORNEYS Sept. 13, 1932. R. E. PETERSON TOILET SEAT STERILIZER Filed June, 3.3, 1931 y 8 Sheets-Sheet 8 INVENTOR ROBERT E. PETERSON WITN ESSES ATTORN EYS Patented Sept. 13, i932 UNITED smras param Iori-lcs ELECTRIC STEAM GENERATORS, INC.,

v DELAWARE F NEW YORK, NJJY., A CORPORATION 0F TOILET SEAT STERILIZER Application led J'une 13, 1931. Serial No. 544,183.

An object of the invention is to provide a sterilizer which will automatically sterilize a toilet seat after it has been used. The sterilizer is provided with` means which will prevent injury to the user and which will make the sterilizer certain in its operation even when the normal movement of its exposed parts is interfered with. y

The toilet seat is preferably made in two sections and there are two compartments in which the toilet seat sections are sterilized, the compartments each having a door. There are means for moving each section of the toilet seat yieldingly in and out of its compartments so that, if the movement of one section is interfered with, the other section will move lnormally and the sectionwhich vis interfered with will quickly move to its normal position when the interference is removed. If the driving means were not 'stopped in certain cases when the movement of a toilet seat section is interfered with, the

cycle o'f operation would be broken. Therefore, there are means to stopl the driving means to prevent such an occurrence.

When the toilet seat sections are moved to positions spaced above the bowl, the driving means is stopped and any further downward movement of the seat sections will set means togagain start the driving means, when the toilet seat sectons again assume their position spaced above the bowl, means being provided to stop the drivingV means when the user has left the seat sections momentarily and has returned thereto.

The doors closing the stlerilizing compartment are opened and are closed yieldingly, and when the movement of a door is interfered with, the other door swill move normally and the door which has been interfered with will quickly assume its normal position when the interference is removed. Means are providedto lock the doors when they have been closed, and means are also'provided to stop the cycle of operation and to prevent the commencement of the sterilization of the toilet seat sections in the compartments until the doors have been .closed and locked. L-

Additonal objects of the invention are to provide means to introduce steam into 'the compartments forsterilizing the seat sec.- tions when the doors have been closed and locked.V The seatsections have inclosed cavities and after the sterilization of the seat sections by the steam has been completed, a 'iuid is introduced into the cavities of the seat sections and another fluid is forced through the compartments around the seat sectionsto cool the outer as Well as the inner surfaces` of the seat sections. The steam is generatedin a boiler which is heated electrically and a cylinder, containing a charge for the boiler, is provided with a piston for' directing the wa'ter into the boiler, the piston being operated and the circuit connected withv the boiler being closed at the commencement of the sterilizing partof the cycle of opera-v tion. On the completion of the sterilization of the seat sections, the valve is opened to fill the pump cylinder with a charge for the nextsterilization, the valve also serving to connect with the interior of the seat sections to supply a cooling fluid thereto. Means are provided to prevent the closing of the circuit connected 'with the boiler and also to open a circuit connected with the motor operating the device when the fluid pressure at the valve .is below normal.

Further objects of the invention are to arrange the elements in a small casing to complete a cycle of operation in all cases in a certain and definite manner when the normal c the Sternizer disposed at a muet bowl with the doors opened and the seat sections departs all the views,

scending. to a position spaced above the toilet bowl Figure 2 is a perspectiveview similar to the View illustrated in Figure 1, but with, the

doors closed and the seat sections spacedl above the toiletbowl in position tobe used,

Figure 3 is an enlarged front sectional elevation of the device,

Figure 4 is an enlarged fragmentary plan view of the device with its top removed,

, Figure 5 is an enlarghd sectional view on the line 5-,5 of Figure 3,

Figure 6 is a sectional view on the line 6-6 olf Flgure 3,

Figure 7 is a sectional -view yon the line 7--7 of Figure 3, y

Figure 8 is a fragmentary sectional view on the line 8-8 of Figure 3, .l v

Figure 9 is an enlarged sectional view illustrating the door operating and locking mechanism, 1,

Figure 10 is a transverse -sectional view il- 1lustrating the compartments with the doors and the means for locking the compartments,

Figure 11 is a sectional view onthe'line 11--11 of Figure 9, l

Figure 12 is a sectional view illustrating one of the'seat sections with the valve means for directing a cooling fluid inan enclosed cavity in the seat section,

Figure 13 is a sectional view on the linel 13-13 of Figure 12, 1 p

Figure 14 is an enlarged sectional view on the line 14-14 of Figure 13,

. Figure 1,5 is a view illustrating the connections for directing steam into the compartments, and r \Fi ure 16 is a diagrammatic view illustrating t e electrical circuits and the means at a door for controlling the electrical circuits.

In the operation of the sterlizer, the doors are unlocked and opened, the seat sections are lowered to a position spaced above the bowl, at which time the doors are closed, and the seat sections are positioned for use.- When the user sits on the seat sections they are pressed downwardly, setting mechanism which starts when'theuser leaves the seat sections, the said mechanism opening the doors for receiving the seat sections,`when the doors are closed and a-iuid, preferably steam, is introduced into the compartments t6 ster- V ilize the seats, after which the seats are cooled by the introduction of a fluid into the cavities in the seat sections, at which time another` pivoted at 25. This movement of the lever 24 will move the arm 26 of the lever 24 downwardly to permit the mercury valve 27 to close under the influence of the spring 28. The bell crank 21 is held yieldingly in linoperative position by a spring 29 and the lever 24 is held yieldingly in the position illustrated in Figure 3 by a` spring 30. It will be seen by again referring to Figure 3 of the drawings, that a spring-pressed hook -31 is mounted on a link 32 and it will, therefore, be understood that when the lever 24 has been moved downwardly, the spring-pressed hook 31 will engage a pin 33 on the lever 24 to hold said lever 24 downwardly, after the pressure against the button 2O has been removed.

The movement of the mercury valve 27 under'the influence of the spring 28 serves to close a circuit connected with a motor 34y in a manner which will belsubsequently described in full. This motor 34 has a shaft 35 on which vthe main shaft 43. The main shaft 43 serves tol rotate several cams, which will be subsequently described.

It will be seen by referring to Figure 3 of the drawings that the lever 24 has a finger 103 disposed in a depression 99 in a cam 97, the cam 97 being secured for rotating with the main shaft 43, as best, illustrated in Figure 6. With the closing of the circuit atlthe mercury valve 27 the motor`34 is operated, which ro'- tates the door cam 48 which is secured to the main shaft 43', this door cam 48 being best4 shown inFigures 6 and 9 of the drawings. The door cam 48 has two projections 49 and 50 which are spaced apart with a depression 51 between the proiections. so that the projection 49 will serve to open the doors, the

doors being permitted to close when the dea pression 51 reaches its operative position, and

.the doors will be again opened when the projection 50 reaches an operative position.

As'will best be seen by referring to Figure 1 kof the drawings, there are two sterilizingcompartments 52 forethe seat sections y53 *and there are two doors 54, one for closing each of the compartments 52, the doors be ing hinged at the `inner sides ofthe compartments 52. When the projection 49 reaches operative position `it presses downwardly against a roller 55 which is journaled l to a slide 56 disposed for moving'in a'guideway 57. There is a cavity 58 `in the slide 56 in which there is disposed a spindle 59which is secured to a plunger 60, the spindle 59 extending in -a guideway 6l in the slide 56 ico and there being a pin and slot connection- 62 which permits a limited movementof the spindle 59 at its plunger 60 relatively to the slide 56. The plunger 60 is held yield `ingly extended by means of aspringi 63` The plunger 60 is positioned for engaging .wrists 65 on stub shafts 66, the wrists 65 carrying arms 67 which have inwardly extending teeth 68, these teeth 68 being best shown in Figure 6 of the drawings. The teeth 68 mesh with beveled gears'69 which have shafts 70 for rotating therewith. Secured or keyed to the shafts '[70 there are members 71 whichare secured to the doors 54 for opening and closing the salid'doors, the shafts 70 serving as pintles `for the doors. Wound around the shafts 70 thelle are springs 72 which are secured to the casing at 7 3 and to the shaft 70 to rotate the shafts yieldingly to move the doors to closed position. It will" -be seen from the above that the doors are opened and closed yieldingly and that should the normal movement of one or both of the doors be interfered with, the doors will quick- 1y assume their normal positions when the inblock 79 there is a rack 81` which engages4 terference is removed.

Whenlthe doors have been opened by the engagement of the projection 49 `on the cam 48 with the .roller 5&5, the two seat sections are moved outwardly from the compartments by the means which will now be described. The seat cam is best illustrated in Figures 3 and 6, this seat Cain being referred to by the character 74. The seat cam has a projection 7 5,.ill`ustrated in Figure 3, the projection 75 being disposed for' engaging a roller 76- mounted on a bracket 77, the bracket 77 being pivoted at 78 to a block 7 9.] The4 block 79 moves in a guideway 80 and secured to the teeth 82 on a lever 83 which has bearings 84 in which pins 85 are disposed, these ypins 85v also extendinig in sl0ts86 in guide members 87, the guide members 87 being connected Aby arms 88 with racks 89 which are disposed for moving in guideways 90 and which mesh with hubs 91 secured to the seat sections, the hubs 91 being mounted on stub shafts 92.

' There is also mounted on the pins 85 a yoke 93 which is connected with the frame by means ofi a spring' 94. There are also springs -95 which are secured to the pins 85 and also to the fpins 96 'which connect the arms 88 with the racks 89. v

It will be understood from the above that the spring 94, which has considerably more strength 'than the springs 95, will .serve t0` hold the pins 85 yieldingly downwardly and serve to move the racks 89 with the racks 89 in their lowermost positions,

as illustrated in Figure 6. This position of the racks 89 by means of the hubs 91,will

vserve to hold the' s eat sections in the compartments until the cam' projection 75 engages the roller 76, which will press down-i pins 85 will,- by the means described, move y the racks 89 upwardly, which will rotate the seat hubs 91 and move the seat sections from within the compartments. The springs 95 yieldingly by the means described to give the seat sections 53 an initial outward movement from vthe com'- v partments 52. The funther downward movement of the seat sections will be regulated by the springs 94 and 95 and until the seat sections are disposed spaced above the bowl, as illustrated in Figure 2. When the seat sections are free from the compartments, vthe door cam 48 will move to a position where the depression 51 will be disposed at the roller 55, which will permit thedoors to close.

There are two cams 97 and 98 secured for rotating with the shaft 43, the cams 97 and 98 being best shown in Figures 3 and 6 of the drawings. The cam 97has two depressions 99 and 100 and the cam 98 has two depressions 101 and 102. When the button 2O was pressed with the mercury valve 27"'and serving to to the motor 34 closed inkeep the circuit dependently of thebutton 20 and the bell `crank 21. Another lever 104 is pivoted at 25,-

this lever 104 havinga finger 105 which was Pdisposed inthe depression 101 in the cam 98 whenthe machine was first started; However, with the rotation of the main shaft 43, the cam 98 is rotated until the finger 105 is out of the depression 101 and against thev outer 'surface .of the cam 98 between its demovement of thel lever 104 at its linger 105 is lagainst the resiliency of a spring 106 and serves to move at its. pin and slot connection 107 on the link 32. By this movement ofthe ico ypression 101 and its'depression 102. This izo lever '104 the link 32 at its spring-pressed hook 31 is moved to the right and out of engagement with the pin 33. It will, therefore, be seen that when the finger 103 reaches the depression 100 in the cam 97, the spring 30 will move the said linger 103 into the depression, which will move the arm 26 of the lever 24 against the mercury valve 27 to open' the mercury valve. The motor will then beA stopped with the doors closed and with the seat sections 53 disposed spaced above the bowl, as shown in Figure 2 oi. the drawings.

It will be seen by rcferringvto Figures 3 and 6 of the drawings that extending downwardly from one of the arms 88 there is a pin 108 which is disposed for engagement with `a lever 109 pivoted to `the frame 110. This lever 109 is held yieldingly against a pin 111 by a spring 112, the lever 109 being articulated to the link 32 by a pin 113. The upward movement of the arms 88 with the downward movement of the seat sections serves to move the pin 108 into close engagement with the lever 109 and the pin 108 is so disposed in close engagement with the lever 109 when the seat sections are spaced above the bowl, as illustrated in Figure 2. With a further downward movement of the seat sections, when the seat is occupied, the pin 108 moves the lever 109 upwardly and through the'link 32 the spring-pressed hook,D 31 is( moved tooperatively engage the p1nV 33 on the lever 24, but the pin -108 serves to hold the lever 109 raised against the iniuence of the spring 112 and with the springpressed hook 31 in operative position, but not pressing down on the pin 33. However, when downward pressure against the seat sections is removed, .the arms ,88 are moved downwardly as the seat sections again assume the position illustrated in Figure 2 of the drawings, moving the 4pin 108 out of Contact with the lever 109, lso that'the spring 112 serves to move the lever 109 against the pin 111, which, by means of the link 32 and the spring-pressed hook 31, presses downj wardly against the pin 33 to move the lever 24 to a position where thenrercury valve 27 is permitted to close under the influence of the spring 28. This closes the circuit to the motor and starts the ldevice to complete its cycle of operation. y 'y However, it will be understood that, if the user should remove pressure from the seat sections temporarily and should again exert downward pressure on the seat sections, the pin 108 will again b e moved upwardly, which will serve, by the means described= to move the spring-pressed hook 31 upwardly to permit the lever 24 to again open the mercury valve 27 With the continued operation of the device the linger 103 on the lever 24 moves out of the depression 100 in the cam 97, leaving the lever held in position out of f operative engagement with the mercury valve l27 by means of the spring-pressed hook 31. However, when the finger 105 on the lever 104 moves out of the depression 102 in the cam 98, the lever 104 is operated and 4by the pin and slot connection 107 moves the 4 link 32 to the right to free the spring-pressedl hook 31 from the pin 33.. During this pe- B5 riod in the cycle of operation, the door-cam 48 has been moved to bring its projection 50 into engagement withthe roller 55 to open the doors and the cam is moved olf the roller 76, the spring 94 moving the yoke 93 downwardly and with it the pins 85 which 70 press the guide members 87 downwardly, which serve to rotate the seat hubs 91 to move ,the seat sections into thecompartments, when the projection 50 on the door cam 48 will pass beyond the roller 55 and permit the 75 doors to close under the influence of the springs 72.

By referring to Figure 3 of the drawings, it will be seen that a link 114 is pivoted to the bracket 77 and another link 115 is piv- 80 oted to the block 79 and to these links 114 and 115 there is pivoted a link 116, the construction being in the nature of a toggle joint, the saidy link 116 being pivoted to a bell crank lever 117 which is held yieldingly by 85 a spring 118, the bell crank lever 117 at 119 being articulated toa link 120 which has a bifurcated end 121 embracing a pin 122 on the mercury valve 27. It will be seen that, with this construction, when the cam 75 has 90 lpassed,` beyond the roller 76, should the upward movement of the seat sections be interfered with, the spring 94 will, through the lever 83 `and the rack 8,1, hold,l the block 79 downwardly, which will operate the bell crank lever having the links 114 and 115, to move the bracket 77- so that the roller 76 will engage the cam 'wheel 74 beyond its projection 75, which lwill move the link 116 inwardly, operating the bell crank 117 to press 100 the link 120 upwardly to move, by the means described, the mercury valve 27 to open position until the interference with the seat sections is removed. i

Whenthe seatsections haveY been moved intol the compartments 52 and the doors 54 have been closed under the influence of the springs 72, the doors are locked to prevent vthe escapeof the steam which is used in sterilizingfthe seat sections, and alsoto prevent the opening of the doors during the sterilizing process, which might cause injury to the user. Each of the doors has a flange 123, as best shown in Figure 10 of the drawings and these flanges rare positioned for engagement 115 by locking hooks 124, the locking'hooks 124/ being disposed for movement in guideways 125 and having rollers 126 mounted on pins 127 which are disposed for moving in slots 128 in the guideways 125. It will therefore 120 be seen that the hooks 124 may move inwardly and outwardly and that the hooks 124 also may have a limited rotary movement at their pins 127. Springs 129 are provided forholding the hooks 124 yieldingly in the. positions- 125 illustrated in Figure 10 of the drawings.

The guideways 125 have shoulders 130, there being cam rods 131 which are disposed for movement between the shoulders 130 and f the rollers 126 for pressing the rollers 126 130 the hooks 124 against springs 129 to move the hooks clear of the danges 123. The ycarni-ods 131 telescope, one within the other, as illustrated in Figures 9 and 10 of the drawings, and each of the cam vrods 131 has a shoulder 133, there being a spring 134 on the cam rods 131 disposed be tween their shoulders 133 to hold the cam rods 131 yieldingly extended. Each of the cam rods has a slot 135, there being lmuckles 136 )disposed in these Islots 135, the knuckles 136 being integral with bellcranks 137 which are pivoted at 138, one of the'bell Vcranks 137' having a roller 139-for traveling in va cam groove 140 in the door cam 48 and beingcom nected by a projection 141 having a roller 142-' engaging a iinger 143 on the otherbell crank 137.

1t will be understood that the locking means is held yieldingly in operative position by means ofthe spring 134 and that, when the roller 139 rides in the groove 140 of the door cam 48 at its portion 144a through the bell cranks 137 ,i the cam rods 131 will be moved inwardly. These cam rods 131 are moved inwardly prior to the openingof the doors and they remain in inoperative position during the period that the doors are closed while the seat sections are disposed at the bowl and when the doors are again opened and the seat sections are moved into the compartments, after which the doors are closed for the sterilizing process, 'the doors being locked during the sterilizing process to prevent the escape of steam and injury to a user by the possible opening ofthe doors. 'It is important that the doors be in closed position when the cam rods 131 are moved outwardly to lock the doors in the manner described' Pins or members 144 are disposed for moving in guideways 145 in the casing at the door-` openings, these pins or members 144 being disposed for engagement by the doors.

These pins extend outwardly from arms y'146 on colars 147 which are rotatably mounted on a shaft 148 ournaled in bearings 149 in the frame. there are members 149 having bearings 150 engaging a lever 151, the lever 151 bein pivoted to a standard 152 on a collar153 to the shaft 148. With this construction it will be understood that should only oneof the arms 146 be moved rearwardlyby a pin Aor member 144, it will rotate the lever 151 on its pivot, which will not rotate the collar.,

153, but when both arms are moved rearwardly b the pins 144, the collar 153 will by the lever. This collar 153 has a. finger 154 which is disposed vfor entering a depression 155 in the door cam 48, which is shownin Figure 9 of the drawings. 'lfhereA vthe inward Extending from the collars 147 eyedv is aispring 155 secured to the shaft-,148 which serves to hold the shaft door cam 48 and it willftherefore, be seen that, if the arms 146 are not pressed inwardly 148 yieldingly 'withl the inger 154 pressed against the face of the by the pins or members 144, the linger 154 will move into the depression 1,55 in the door cam 48 when the finger reaches the said depres-= sion, which is immediately before the sterilizing period in the cycle of operation.

The shaft 148 isfbent at the spring 155, as best 'shown in Figure 11 of the drawings, and the bent terminal of this shaft 148 is disposed at the pin 156 of the mercury valve 27 for opening the mercury valve 27 when the iinger 154'enters the depression 155a in the door cam 48'." It will, therefore, be understood -that when the pins or members 144 are not pressed inwardly at the commencement of the period of sterilization inthe cycle of operation, the motor will be stopped and the operationpof the sterilizer will be interrupted until the doors are permitted to close, when bers 144'will, by the the finger 154 out of the door cam 48 means described, move the depression 155 in to move .the bent arm of the In order to guard against the possibility of the user, through curiosity, lpressing inwardly .the pins or members` 144 with the doors open, pins 157 project from the members 149 to be engaged by cams 158 on the door pintles 159, which are in alignment with the shafts 70 shown in 'Figure 9 of the draw-v ings. rlhedoor knuckles 160 are 'secured to the door pintles 159, the door pintles being ldisposed iny bearings 161 on the frame. The cams 158 are disposed toengage the pins 157 and prevent the collars 147 from rocking the (collar 153 through the lever 151 when the doors are in open position. rlhe boiler, which is used in the generation of the steam tor the sterilization of the seat .sections in the compartments, is referred to by the reference characters 162 in Figure 3 of the drawings, this steam generator being shown in detailin applicants United States patent application which was filed on August 23rd, 1930 andwhich bears Serial No. 477,433. The outlet pipe 163 from the boiler 162 is best. shov in Figure 15 of the drawings and it will be seen that has branches 164 leadin to the compartments respectively, each ranch 164 having La plurality of outlets 165 which, as best shown in Figures 10and 11, are providedV kwith`bailles 166 which serve to direct the steam laterally in all directions at each outlet 165 in the compartments.

The boiler v162 is supplied with a chargeA j of water which is contained in a cylinder 167 by the connecting y the bottom of the cylinder 167 to the boiler pressure against the pins or memthis outlet pipe 163 ias pipe 168 leading from 162. There is a piston I169 in the cylinder 167 having a piston rod 170, the piston rod 170 having an opening 171 in which is disposed a knuckle 172 on a lever 173, the lever 173 having a roller 174 which travels in a cam groove 175 in the cam 7 4 keyed to the main shaft 43, the lever 173 being'mounted for rocking at 176 on the shaft 45. It will,

connects a valve 178 with the cylinder 167,

this said valve 17 8 having a valve stem 179 which is engaged by an arm 180 on a lever 181 which is mounted to rock at 182 on theshaft 45, as best shown in Figure 6 of the drawings. rlhis lever 181 has a roller 183 which `-travels in a'cam groove 184 in the gear 47 Therefore, by the said means the valve stem 179 will be operated with the rotation of the main shaft 43 and the gear 47.

The valve 17 8, which is bestpshown in Figure 3 of the drawings, has two valve seats 185 and 186, the valve stem 179 being provided with a valve 187commanding the valve seat 185 and there being a valve 188 com manding the valve yseat 186, the valve`188 having a valve stem 189 around which there is a spring 190 which serves to hold the valve 188 yieldingly on its seat -186. Extending beyond the valve 188 there yis a member 191 with radially extending vanes which permit a iuid to pass through the valve seat 186 when the valve 188 is moved downwardly from the valve seat 186 by the valve stem 179 which extends below the valve 187.

As has been stated, the valve 178 is connected with the cylinder 167 by the pipe 177. A water inlet 192 leads to the valve 178 at a lateral extension 193 of the valve which is disposed in the chamber below the valve seat 186. It will, therefore, be understood that when the valve stem 179 is moved downwardly through the movement of the lever 181 and the roller 183 in the cam groove, water will be permittedto flow through the valve seat 186 and,.if the valve stem is moved to its lowermost position, the waterwill also low through thevalve seat 185 and through the pipe 177 to the cylinder 167. Therefore," during each cycle, the cylinder 167 is supplied with a charge of water throu h the valve'178, the water passing through t e inlet 192 through the valve seats 186 and 185,l

in the manner described, to the cylinder.

The valve 178 also has an outlet 194 in thechamber between the valve seats 185 and 186,

they outlet 194 beingl connected with a pipe 195 which is connected to the means for introducing water into the in closed cavities in the seat sections for cooling the seat sectionsv after theyhave been sterilized by steam in the compartments.

As ameans to stop sterilizer, when the water` pressure at the valve 178 falls below a predetermined point, a bellows 196 is connected to 'the lateralextension 193 on the valve 178 and engaging this bellows 196 there is an arm 197 of a lever 198 which is pivoted at 199, the lever 198 being held with its arm 197 against the bellows 196 by means of a spring 200. Articulated to the lever198 there is a link 201 which has an arm 202 disposed at the mercury valve 27 for opening the mercury valve 27 against the resiliency of the spring 28 when the bellows 196 moves inwardly through lack of pressure in the valve 178. \The link 201 also extendsto a mercury valve v203, which, as will be subsequently described, opensand closes the circuit connected with the boiler.y 162. By this means, not only will the operation of the sterilizer be stopped, when the water prssure at the valve 178 falls below a'certain point, but the circuit connected with the boil` er 162 will also be opened.

As has been stated, he mercury valve 203 serves to `open and close the circuit leading tothe boiler 162, a spring 204 being provided for holding the mercury valve 203 yieldingly closed. The closure of the mercury valve 203-is prevented by a cam 205 on a link 206 before and after the sterilizing period in the cycle of operation, this link 206 being articu- .lated at 207 Yto a lever 208 which is pivoted at 209 to the casing, thelever 208 having a roller 210 which travels in a cam groove 211 in ther main gear '47 It will be understood that when the roller 210 moves into thedepressions 212 in the cam groove 211, the depressions being shown in Figure 3 of the drawings, the link 206 will move downwardly to move its cam 205 below the roller 212a en the mercury valve 203, thereby permitting the mercury valve 203 to close under the inluence of its spring 204. The mercury valve theoperation of the 203 remains closed during the sterilizing period.

At the completion of the sterilizing period,

the surface 213 in the cam groove 211 will engage the roller 210 to move the link 206 upwardly to open the mercury valve 203. the continued upward movement of the link 206 pressing upwardly the bifurcated termi- 4nal 214 of the link 206, this bifurcated terminal 214 embracing a pin 215 on a lever 216 which is secured to an air valve 217 pivoted at 2.18 in a compartment 219 at the top of the casing. f

l There are two of these air valves 217, one of the air valves 217 being operatedin the remesa manner described and theother air valve 217 being operated through a link 220which connects an arm 221 on the lever 208 with the other lever 216, the link 220 having a bifurcated terminal 22 which embraces the pin 215. It will,therefore, be seen that when the link 206 has moved downwardly, it opens the mei'- cury valve 203 to close a'circuit leading to the boilerI 162 and when the lever 208 is moved upwardly it opens both air valves 217.

As will best be seen by referring to Figure 7 of the drawings, these air-valves 217 control communication from the air compartment 219 to the compartments 5,2Yandair is forced by the fan 223, secure'dlto the shaft 35 of the motor 34, through the ports controlled by the valves 217 into the compartments. This air enters the casing through .a rear opening 224 which is provided with van/els 225 which are spaced apart and which extend inwardly and upwardly to prevent dirt from collecting 'on pressed to permit the water to the vanes, which may be drawn into the casing, the a-ir passing to the compartment 219 at the rear of the compartments 52 through an opening 226 above the compartment 219.

This opening226 extends preferably in a lid 227 which is disposed for closing" the top of the casing.

At the end of the -sterilizing period in the cycle of operation, and when the air valves n217 have been opened, water is introduced into the cavities in the seat sections through the valve seat'186 and the'port 194 in the valve 178, the valve stem 179 being suihciently deiiow through the valve seat 186 afterl the cylinder 167 has been filled with a charge of water for the next sterilizing period and when the valve 187 has again been moved to a position where it Acloses the port 185. As has Vbeen stated, this water Hows from the port 194 through the pipe 195, the pipe195 leading to a valve 228 lhaving an inlet port 229, two ports 230 and an outlet 231, the outlet 231 being disposed above-a portion 232 of the bottom of the casing leading to the drain 233, which is disposed above the bowl of the toilet. In the valve casing there is a valve 234, there being a spring 235 for pressing the Yvalve 234 with its head 236 against the port 229, the head 236 being preferably provided with an aperture 237 to permit the head 236 of the valve 234 to move readily away from the port 229 under the influence of the water passing through the pipe 195. rlhis valve 234 is also provided with ports 238 which communicate with the ports 230 in the valve casing when the valve 234 is in its closed position.

Pipes 239 connect the ports 230 in the valve casing with lpassages .240 in the members on which the seat sections are pivoted and there are passages 241 in the seat sections which lead to ,cavities 242 therein, the said passages 241 being positioned to adord communication between the passages 240 and the cavities 242 and in the compartments 52. ln the cavities 242 in each seat section there is a pipe 243 which communicates with a passage 244 in the seat section leading to a passage 245 in the members on which the seat sections are pivoted, the said passages 245 in the said members leading to' outlets 246 to the portions 232 at the bottom of the casing. It will, therefore, be understood .that when the`seat sections have been sterilized in the compartments 52, the Water pressure in the pipe 195 will press the head 236 of the valve 234 away from the port 229 and permit the water flowing in the pipe 195 to pass through the ports 238 and through the ports 230 to the pipes 239 and into the cavities 242 in the seat sections, the water passing out of the cavities 242 through the pipes 243 to the outlets 246. When the flow of water through the pipe 195 has been discontinued through the closing of the valve seat 186, the

valve 234 will move to the position lindicated in Figure 14 of the drawings, and all water contained in the cavities 242 will flow through the passages 241y to the passages 240, and thence through the ports 230 and 238 and out v of the outlet-231 to the drain 233. Therefore,

drawings, and which has a pin and slot connection 248 with the. lever 208, is moved down'- wardly by the lever 208. Secured to this link 247 there is a rack 249 which moves in a guideway 250, the teeth of the rack249 meshing with the teeth 251 secured to the rotary valves @.252 which are disposed at thcbottom and at the rear of the compartments 52. These rotary valves 252 are cylindrical, with passages 253 therein, there being apertures 254 in the valves 252 which permit the waters of condensation tp'pass from the compartments into lthe passages 253 in the valves 252 when the valves 252l are closed. The said valves 252 have outlet ports 255 which are disposed ad-Y 252 permit not only the escape ofthe waters" of condensation, but also when they are open, the air which hasbeen directed into the compartments 52 at the valves 217. This completes the cycle of operation, when the finger 103 will be disposed inthe depression 99 in the cam 97 and the finger 105 will be disposed in the depression 101 in the cam 98. By referring to Figure 16 ofthe drawings, it will be seen, where the circuits are shown diagrammatically, that a wire 256 leads to the motor 34 and through a wire 257 to the boiler 162, a wire 258 leading from the motor 34 to a ies Y has been closed as stated above.

wire 259 (shown in dotted lines) and to the mercury valve 27, a wire 260 leading from the mercury valve 27 to the mercury valve 203, a wire 261 leading from the wire 260 to the wire 262, a wire 263 leading from the mercury valve 203 to the boiler 162. It will, therefore, be understood that when the mercury valve 27 i is closed, a current will pass through the motor to operate the latter and that when the mercury valve 203 is closed, a current will pass through the boiler 162 to heatthe latter. Not only may the sterilizer be used by pressing the button 20, but, as will be seen by referring to Figure 16 of the drawings, theA sterilizer `may be used by another means which may be secured to a'door. When this is the case, the button 20 and the bell crank i 21 may be dispensed with, and the wire 259, which is shown in dotted lines in Figure116 of the drawings,'will also be omitted. 1n this arrangement, a lever 264 is secured to a door handle, and when the door handle is rotated to open the door, its lever 264 is moved in the direction of the arrow and the spring 265 on the lever will engage a stud 266 on a mercury valve 267, the engagement of the spring 265 with the stud 266 serving to close the mercury valve 267, and the finger 268 on a springpressed lever 269 entering a recess 270 on a disc271 carrying the stud 266, which holds the mercury valve 267 closed against the resiliency of a spring 272. A current will then flow from the wire 256. through the motor 34, through the wires 258 and 258a to the wire 272, through a. resistance 27 4a to the mercury valve 267 and to the wire 262. This will operate the motor until the fingers103 and 105 move out of the recesses 99 and 101 in the cams 97 and 98 respectively. The continued operation of the sterilizer will then proceed in accordance with the description which has been outlined above.

It will be understood that the lever 264 may pass beyond the stud 266, its spring 265 serving to operate the mercury valve 267, the mercury valve being held in operative position by the means describedv and the arm 264 may pass through an arc of approximately 180.

There is a stop 274 which is positioned for engagement by the finger 268 which limits the rotary movement of the mercury valve 267 when the finger 268 is moved away from the recess 270. It will be understood that during the cycle of operation, current `will not only iiow through the wire 258 to the wire 273, but current will also iiow through the wire 258", through the solenoid 275 to the wire 276 and to the mercury valve 27 which This will energize the solenoid 27 5 to move its armature 277 in the direction of the arrow and against .the resiliency of the spring 278 to press outwardly the arm 279 of the lever 269, which will move the lever 269 out of the recess 270 and permit the mercury valve 267 to moveto open position under the inuence of its spring 272. The wires 258a and 276 will, however, still beconnected 4through the solenoid 275. i p

It is possible that someone may open the door, which will start the operating mech. anism in the manner described, until the seat sections are spaced above the bowl, as shown in Figure 2 of the drawings, and without using the toilet the said person may open the door and pass out. Itis, therefore, necessary to provide means for completing the cycle of operation'in such a case. This means consists of a member 28,0 which is secured to the means for opening the door from the inner side, this-member 280 having an arm 281 which is articulated to a link 282, the link 282 having a pin and slot connection 283 with a disc 284 to which a mercury valve285 is secured, the mercury valve 285 being held yieldingly in open position by a spring 286. It will be understood that, by the means described, should the inner door handle be operated to open the door, a circuit will be closed leading from the motor 34 to the wires 258 and 258 to the solenoid 275, a wire 287 to the mercury valve 285, and a wire 288 from the mercury valve 285- to a switch member 289, this switch member 289 being not only shown in Figure 16 of the drawings, but also in Figure 3 of the drawings, and being positioned for movement by one of the guide members 87 when the seat sections are disposed above the bowl, as illustrated in Figure 2 of the drawings, to contact with astationary switch member 290. This switch will connect the wire 288 with the wire. 291 which leads to the wire'k261 connected with the wire rlhis current will energize the solenoid 27 5 yvhlch will move the arm 292 to operate the ever 293 so that the finger 294 on the said lever 293 will engage the recess 295 on the discy 284. This will close the circuit through the motor 34 and with theoperation of the motor,

and throughl the means described, the motor will serve to drive the mechanism until the ioo nger 103 of the lever 104 has passed beyond the recess 100 in the cam 97, when the valve 27 will be closed and the motor will be energized through the solenoid 275 to the wire 276. At the complete termination of the cycle of operation the mercury valve 27 will be opened in the manner described, which will deenergize the solenoid 275 and permit the mercury valve 284 to open to the position indicated in Figure 16 of the drawings.

What is claimed is:

\1. Inra sterilizer, two compartments, two seat sections movable relatively to each other, two doors for closing the compartments respectively, means for moving the seat sections yieldingly into and out of the compartments, means for yieldingly opening and closing the doors` and meansfor. operating the first and second mentioned means which will at times delay the closing of the doors until both seat sections are within thevcompartments. l

2. In a sterilizer, a, compartmentvmeans, a

I closure means for the compartment means, a

seat, means'V for moving the seat yieldingly into and out ofthe compartment means for opening and closing the closure means, and means for operating the first and second mentionedmeans which will at times delay the closing of the closure means until the seat is within the compartment means.

3. In a sterilizer, a. seat, means connected with the scat for operating the latter, a guide means secured to the first mentioned means, a member in the guide means, resilient means for holding the member yieldingly in the guide means, resilient means'connecting the member with the first mentioned means, and means for moving the member in the guide means.

4. Ina sterilizer, a seat, means connected with the seat for movingthe latter, two guide members, each having a slotfthe guide' members being secured to the said means, a member extending in the slots, resilient means for holding/the member yieldingly relatively to v the guide members, a second resilient means Vguide members.

for holding the member yieldingly relatively to the first mentioned means, and means for moving the member 5. In a sterilizer, two seat sections, two means for moving the seat sections respectively, two guide members, each with a slot, the guide members being secured to the said two means respectively, a member extending in the slots, resilient means for holding the member yieldingly in the slots, additional resilient means connecting the `third mentioned member with the first two mentioned means respectively, and means for moving A the member in the slots in the guide members.

6. In a sterilizer, an operating cam, a block,

a bracket normally engaging the blockr andA movable relatively thereto, a member on the bracket :tor engaging the cam,'a seat, means cooperating with the block and the seat for moving the seat, means including an electric motor and a circuit for moving the operating cam, an eXtensible member connecting .the bracket and the block, and means operable by the eXtensible member for opening and closing the circuit.

7. In a sterilizer, an operating cam, a block, a bracket normally engaging the block and movable relatively thereto, a member on the bracket for engaging the operating cam, a

toilet seat, means cooperating with the block and the toilet seat for moving the toilet seat, means including an electric motor and a circuitufor moving the operating cam, a toggle joint connecting the bracket and the block,

.cured to the first mentioned means, a member in the slots in the l ber movably mounted on the block for enand means operable by the toggle joint for opening and closing the circuit.

8, In a sterilizer, a toilet seat, means for moving the toilet seat, a guide means sein the guide means, resilient means vfor holding the member yielding-lyl in the guide means, a resilient means connecting the member with the' first mentioned means, an operating cam, a block, a bracket normally engaging the block and movable relatively thereto, a member ons the bracket for engaging the cam, means connecting the block with the member formoving the latter in the guide means, means including an electric motor and a circuit for moving the operating cam, an eXtensible' member connecting the bracket and the block, and means operable by the extensible member for opening and closing the circuit. 9.V In a'sterilizer, a toilet seat, means for moving. the toilet seat, a guide means secured to lthe first mentioned means, a member in the' guide means, resilient means for'holding the member yieldingly in the guide means,- a resilient means tconnecting the memberwith the first mentioned means, an operating cam1 a block, a bracket `normally engaging the block and movable relatively thereto, a member on the bracket for engaging the cam, means connecting the block with the member Y for moving the latter in the guide means, means for moving the operating cam, an eX- tensible member connecting the bracket and the block, and meansoperable by the eXtensible member for renderingthe sixth mentioned means inoperative.

l0. In a sterilizer, a toilet seat, means to move the toilet seat in one direction, means to operate the iirst mentioned means, means cooperating with the first mentioned means to set the second mentioned means for operation when the toilet seat moves in another direction, the tliird mentioned means control-ling the operation of the second mentioned means through the positioning of the seat.

11. In a sterilizer, a ltoilet seat, means to move the toilet seat including a member hav-l ing a projection, means to operate the first mentioned meansfincluding an electric motor'witha circuit, and means positioned for engagementv by the projection for opening the circuit when the projection is in one position and for closing the circuit when` the projection is in another position. 12. In a sterilizer, a toilet seat, means to move the toilet seat including a block and a member having a projection, a cam, a memgaging the cam, means to operate the cam, including an electric motor with a c circuit, means positioned for engagement by the projection for opening and closing the circuit,

an extensible member connecting the second 13 13. In a steriliZer a circuit, a switch in.

the circuit, means or holding theswitchly yieldingly closed, a lever positionedv to engage the switchto open the latter, a pin on rthe lever, a link, a hook on the link for engaging the pin to hold the lever when it has been moved to permit the switch to close, a toilet seat, means to move the toilet seat, means for operating the second mentioned means including an electric motor in the circuit, means driven b the thirdV mentioned means to free the`hoo from the pin, thereby permitting the switch to open, means operable by the second mentioned means to move the link to again engage the hook with the pin, the positioning of the toilet seat thereafter serving, through the second and fifth mentioned means, to open the switch and permit the switch to close.

14,. In a sterilizer, a circuit, a switch/fin the circuit, means for holding the switch yieldingly closed, a lever positioned to engage the switch to open the latter, apin on the lever, a link, a hook on the .link for engaging the piny to hold the lever when it has been moved to permit the switch to close, a toiletseat, means to move the toilet seat, means for operating the second mentioned means including an electric motor in the circuit, means driven by the third mentioned means to free the hook from the pin', thereby permitting the switch to open, means operable by the second mentioned means to move the link to again' engage the hook with the pin, the positioning of the toilet seat thereafter serving, through the second and ifth mentioned means to open the switch and permit the switch to close,`\the fourth mentioned means serving to free the lever from the switchwhen the motor, which has been again started, hasrun a predetermined time.

15. Ina sterilizer, a circuit, a switch in the circuit, an electric motor in the circuit, means for closing the switch, a toilet seat, means for moving the toilet seat, means by which the electric motor is adapted to operate the second mentioned means, means cooperating with the third mentioned means for opening the switch and permitting the switch to close, and means cooperating with the second mentioned means for. opening the switch.

16. In a sterilizer, a circuit, a switch in the circuit, an electric motor in the circuit, means for closing the switch, a toilet seat, means for moving the toilet seat, means by which the electric motor is adapted to operate the second mentioned means, means cooperating with the third mentioned means for opening the switch and permitting the switch to close, means cooperating with the second mentioned means for opening the switch, and means cooperating with the second mentioned means for opening the switch when the movement of the toilet seat by the second mentioned means is interferedl with.

17. In a sterilizer,]a circuit, a, switch in the circuit, an electric-motor in the circuit,

means for closing the switch, a toilet seat,

means for moving the toilet seat, means cooperating with the electric motor and the second mentioned,means for operating the latter, means for opening the switch, means cooperating with the third and fourth mentioned means, for operating the latter, and means for moving the fourth mentioned means into inoperative position.

18. In a sterilizer, a motor having alcircuit, a toilet seat, means cooperating with the motor and the toilet seat for moving the latter, a pin on the said means, a pivoted lever disposed in the path of the pin, and means for opening and closing the circuit operable by the lever. Y

19. In a sterilizer, a motor having a circuit, a toilet seat, means cooperating with the motor and the toilet seat for moving the latter, aipin on the said means, a pivoted lever disposed in the path of the pin, means for opening and closing the circuit operable by the lever, and means for holding the lever yieldingly in a predetermined position.

20. In 'a sterilizer, a motor having a circuit with a switch, a toilet seat, a block, means cooperating with the block and the toilet seat for moving the latter, a cam means operable vby the motor, a.- member movably mounted on the block and engaging the cam,

two links pivoted to the block and to the member respectively, a third link pivoted to the said two links, a lever pivoted to the third link, and means cooperating with the lever and the switch Vfor controlling the latter.

21. In a sterilizer, a motor with a circuit and a switch, a door. means cooperating with the motor andthe door for moving the latter, means for moving the switch into one position, a lever for moving the switch into another position, and means cooperating with the first mentioned means and the lever.

for moving the latter.

22. In a sterilizer, a motor with a circuit and a switch, a door, means cooperating. with the motor and the door for moving the latter, a lever for moving the switch into a predetermined position, and a cam driven by thesaid means and engaged by the lever for operating the latter.

23; In a sterilizer, a motor with a circuit and a switch, a door, means cooperating with the motor andthe door for moving the latter, a lever for moving the switch intoa predetermined position, and a cam engaged byy the lever for normally holding the lever with the switch in the said position, the cam having surfaces in the path of the lever for peri' odically moving the lever to permit the switch to-move to another position.y

24. In a sterilizer, a motor and a circuit ywith a switch, a door, means cooperating 5 with the motor and the door for moving the", tlatter, a lever for moving the switch into a predetermined position, two'cams driven by `the rst mentioned means, one of the cams 'being engaged by the lever for operating the latter,a pin on the lever, a second lever engaging the other cam to be operated thereby, and a spring-pressed means operated by the second mentioned lever for engaging the pin. 25. In a sterilizer, a motor and a circuit with a switch, a door, means cooperating with the motor and the door for moving the latter, a lever for moving the switch into a predetermined position, two cams driven by the first mentioned means, one of the cams being engaged by the lever for operating the latter, a pin on the lever, a second lever engaging the other cam to be operated thereby, a spring-pressed means operatedby the second mentioned lever for engaging the pin,

mentioned lever which serves to move the pin for engagementby the spring-pressed means. 26. In a sterilizer, a motor with a'circuit and a switch, a seat, means cooperating with the motor and the seat' for moving the latter, a lever for moving the switch into a predetermined position, two cams driven by the said means, one of they cams being engaged by the lever for operating the latter, a pin .on the lever, a/second lever engaging the other cam to be operatedthereby, a spring-pressed means operated by the second mentioned lef ver vfor operatively engaging the pin, and means cooperating with the first mentioned means and the spring-pressed means for moving the latter to operatively engage the pin by the hook. y p

27. In a sterilizer, a motor with a circuit and a switch, a seat, means cooperating with the motor and the seat for moving the latter, a lever for moving the switch into a predetermined position, two cams driven by the said means, one of the cams being engaged by the lever for operating the latter, a pin on the lever, a second lever engaging the other cam to be operated thereby, a spring-pressed means operated by the second mentioned lever for operatively engaging the pin, means cooperating withthe first mentioned means and the spring pressed means for moving the latter to operatively engagethe pin by the hook, and Na fourth means for operating the first mentioned lever, which serves to move Y the pin for -engagement by the hook.

28. In a sterilizer, a motor with a circuit and a switch, a seat, means cooperatingwith the motor and the seat for moving the latter,

a pin on the said means, a lever for moving the switch into a. predetermined positiomam and additional' means for operating the first Ameans for rotating the stub means driven by the first mentioned means, the cam means being engaged by the lever for operating the latter, a pin on the lever, a second lever engaged b. the cam means to be operated thereby, a lin pivoted to the second mentioned lever, a spring-pressed hook on the-link for operatively engaging the second mentioned pin,.a third lever-disposed in the path of the first mentioned pin, the third lever being pivoted to the link.

29. In asterilizer, a motor with a circuit and aswitch, a seat, means cooperating with the motor and the seat for moving the latter, a pinl on the said means, alever for moving the switch into a predetermined position, cam means driven by the first mentioned means, the cam means being engaged by the lever for operating the latter, a pin on the lever, a second leverengaged by the cam means to be operated thereby, a link pivoted to the second mentioned lever, a spring. pressed hook on the link for operatively en- Agaging the second mentioned pin, a third lever disposed in the path of the first mentioned pin, the third lever being pivoted to the link, and manually operable means for operating theV first .mentioned lever.

l30. In a sterilizer, two compartments, two doors for closing the compartments respectively, two stub shafts secured to the doors forl opening and closing the latter, resilient means for rotating the stub shafts, gears on the stub shafts, two pivotedarms with teeth l for engaging the gears, wrists on the arms, a plunger for engaging the wrists to rock the arms and thereby rotate tle stub shafts, and means to operate the plunger. v

31. In a sterilizer, two compartments, two doors for closing the compartments respectively, -two stub shafts secured to tlie doors for opening and closing the latter, resilient means for rotating thestub shafts, gears on the stub shafts, two pivoted arms with teeth for engaging the gears, wrists on the arms, and a. plunger for engaging thewrists to rock the arms and thereby rotate the stub shafts t'o open the doors. y Y

32. In a sterilizer, two compartments, two doors for closing the compartments respectively, two stub shafts secured to the doors for opening and closing the latter, resilient shafts, gears on ythe stub shafts, two pivoted arms with. teeth. for engaging the gears, wrists on the arms, a plunger for engaging the wrists to rock the arms and thereby rotate the stub shafts to open the doors, and resilient means for pressingthe plunger against the wrists. p

for engaging the gears, wrists on the arms, a'

plunger for engaging the wrists to rock the arms and thereby rotate the stubfvshafts to open the doors, the plunger having a stem, a casing having a guide in which the stem is disposed, a spring around the stem be tween the casing and the plunger, and means to move the casing periodically.

' 34. In a sterilizer, two compartments, two doors for closing the compartments respectively, two' stub shafts secured to the doors for opening and closing the latter, resilient means for rotating the stub shafts gears on the lstub shafts, two pivoted arms with teeth for engaging the gears, wrists on the arms, a plunger' for engaging the wrists to rock the arms and thereby rotate the stub shafts to open the doors, the plunger having a stem, a casing having a guide in which the stem is disposed, a pin and slot connection between the stem and the casing to limit the move'- ment of the plunger -relatively to the casing, a spring around thev stem between the casing and 'the plunger, and means to move the casing periodically.

35. In a sterilizer, a motor with a circuit,

a compartment means, a closure means for the compartment means, means operable by the motor for sterilizing the compartment means at a predetermined time, and means for opening the circuit vit the said predetermined time When the closure means is opened.

86. In a sterilizer, a motor with a circuit,

`a compartment means, a closure means lfor the compartment means, means operable by the motor for sterilizing the compartment means at a predetermined time, means. for opening the circuit at the said time, and means cooperating with the closure means and the compartment means to render the fourth mentioned means inoperative. Y

37. In a sterilizer, a motor with a circuit, la compartment means, a closure means for Ythe compartment means, means operable by 'the motor for sterilizing the compartment means at a predetermined time, means for opening a circuitl at the said time, a member at the compartment means for engagementby the closure means, and means cooperating with the member and the fourth mentioned means for rendering the fourth mentioned means inoperative. E

38. In a sterilizer, a motor with a 'circuit, a compartment means, a closure means forlthe compartment means, means operable by the motor for sterilizing the compartment means at a predetermined time, means for opening a circuit at the said time, a member at the vcompartment means for engagement by the closure means, means cooperatingv with the member and the fourth mentioned means for rendering the fourth mentioned ymeans inoperative, and means operative while the door is open to prevent the member from rendering the fourth mentioned means inoperative through the fifth mentioned means.

39. In a sterilizer, a motor with aV circuit, a compartment means, a seat movable into and out of the compartment means, a closure means for the compartment means, means operable by,l the motor for sterilizing the compartment means at a predetermined time, means for opening a circuit at the said time, a member at the compartmentvmeans for engagement by the closure means, means cooperating with the member and the fourth mentioned means for rendering the fourth mentioned means inoperative, and means op'- erative while the door is open to prevent the member from rendering the fourth mentioned means inoperative through the fifth menl tioned means. K

40. In a sterilizer, a motor with a circuit, two compartments, doors for closing the compartments, means operable by the motor for syterilizi'ng the compartments at a predetermined time, a disc with a depression, means connecting the first mentioned means with the disc for moving the latter, a shaft, a coli lar keyed to the' shaft, the collar having a finger for engaging the disc to move into the depression at the said time, two collars mounted to rock on the shaft, two members, one at each compartment to be engaged by the doors when ythe doors are closed, means by which the members are adapted to rock -the said two collars respectively, means by by which the shaft is adapted to open the p circuit when the finger moves into the depression in the disc.

41. In 'a sterilizer, a` motor with a circuit, two compartments, doors for closing the compartments, means operable by the motorvfor sterilizing the compartments at a predetermined time, a discwith a depression, means connecting the first mentioned means withlthe disc for moving the latter, a shaft, a collar keyed to the shaft, the collar having a finger for engaging the disc to move into the depression at the said time, two collars mounted to rock on the shaft, two members, one at each compartment to be engaged by the doors when the doors are closed, means by which the members are adapted to rock the said two collars respectively, a stud mounted on the first mentioned collar, a lever pivoted to the stud for engagement with members on the said second and third mentioned collars, and means by which the shaft is adapted to open the circuit when the finger moves into the deoperating the latter, means for closing the 

